Stiebel Eltron
No Display / No Power to Control Electronics
Display is blank or does not power on, but supply voltage is present at the unit.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Blown internal fuse on control board, Failed low-voltage power supply on PCB, Loose neutral or live connection to electronics, Faulty display module
How to Fix / Troubleshooting
Safety: Turn off power before opening the unit. Only qualified personnel should test live circuits.
- Verify supply: Confirm correct line voltage at the main terminals with a multimeter.
- Check internal fuse: Locate any internal fuses on the control board. With power off, test continuity and replace blown fuses with identical type and rating. Investigate cause of blown fuse.
- Inspect connectors: Ensure the display module cable is firmly connected to the main board.
- Test display module: If low-voltage power is present on the board but the display remains blank, the display module may be faulty and require replacement.
- Board replacement: If the low-voltage supply on the PCB has failed, the entire control board typically must be replaced by a technician.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board / Display Module
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